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Jeong, Hoon Eui
Multiscale Biomimetics & Manufacturing Lab
Research Interests
  • Biomimetics
  • Multiscale manufacturing
  • Micro/nanofabrication


A nontransferring dry adhesive with hierarchical polymer nanohairs

DC Field Value Language Jeong, Hoon Eui ko Lee, Jin-Kwan ko Kim, Hong Nam ko Moon, Sang Heup ko Suh, Kahp Y. ko 2015-07-23T02:12:12Z - 2015-07-22 ko 2009-04 -
dc.identifier.citation PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v.106, no.14, pp.5639 - 5644 ko
dc.identifier.issn 0027-8424 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract We present a simple yet robust method for fabricating angled, hierarchically patterned high-aspect-ratio polymer nanohairs to generate directionally sensitive dry adhesives. The slanted polymeric nanostructures were molded from an etched polySi substrate containing slanted nanoholes. An angled etching technique was developed to fabricate slanted nanoholes with flat tips by inserting an etch-stop layer of silicon dioxide. This unique etching method was equipped with a Faraday cage system to control the ion-incident angles in the conventional plasma etching system. The polymeric nanohairs were fabricated with tailored leaning angles, sizes, tip shapes, and hierarchical structures. As a result of controlled leaning angle and bulged flat top of the nanohairs, the replicated, slanted nanohairs showed excellent directional adhesion, exhibiting strong shear attachment (approximate to 26 N/cm(2) in maximum) in the angled direction and easy detachment (approximate to 2.2 N/cm(2)) in the opposite direction, with a hysteresis value of approximate to 10. In addition to single scale nanohairs, monolithic, micro-nanoscale combined hierarchical hairs were also fabricated by using a 2-step UV-assisted molding technique. These hierarchical nanoscale patterns maintained their adhesive force even on a rough surface (roughness < 20 mu m) because of an increase in the contact area by the enhanced height of hierarchy, whereas simple nanohairs lost their adhesion strength. To demonstrate the potential applications of the adhesive patch, the dry adhesive was used to transport a large-area glass (47.5 x 37.5 cm(2), second-generation TFT-LCD glass), which could replace the current electrostatic transport/holding system with further optimization ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher NATL ACAD SCIENCES ko
dc.subject GECKO FOOT-HAIR ko
dc.subject FARADAY CAGE ko
dc.subject ASPECT-RATIO ko
dc.subject SURFACES ko
dc.subject LITHOGRAPHY ko
dc.subject PLASMA ko
dc.subject ARRAYS ko
dc.subject DEVICES ko
dc.subject SILICON ko
dc.title A nontransferring dry adhesive with hierarchical polymer nanohairs ko
dc.title.alternative A nontransferring dry adhesive with hierarchical polymer nanohairs ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-65249190864 ko
dc.identifier.wosid 000264967500035 ko
dc.type.rims ART ko
dc.description.wostc 209 *
dc.description.scopustc 216 * 2015-12-28 * 2015-11-04 *
dc.identifier.doi 10.1073/pnas.0900323106 ko
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